package com.lagou.dao.impl;

import com.lagou.dao.CourseDao;
import com.lagou.pojo.Course;
import com.lagou.utils.DruidUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;


/**
 * CourseDao实现类
 */
public class CourseDaoImpl implements CourseDao {
    @Override
    public List<Course> findCourseList() {
        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "select id,course_name,price,sort_num,STATUS from course where is_del = ?";

            List<Course> courseList = qr.query(sql, new BeanListHandler<Course>(Course.class), 0);
            return courseList;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }

    }

    @Override
    public List<Course> findByCourseNameAndStatus(String courseName, String status) {
        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            //当前查询为多条件不定项查询
            StringBuffer sb = new StringBuffer("select id,course_name,price,sort_num,STATUS from course where 1=1 and is_del = ?");

            List<Object> list = new ArrayList<>();
            list.add(0);
            if (courseName != null && courseName != "") {
                sb.append(" and course_name like ?");
                courseName = "%" + courseName + "%";
                list.add(courseName);
            }

            if (status != null && status != "") {
                sb.append(" and STATUS = ?");
                int i = Integer.parseInt(status);
                list.add(i);
            }

            List<Course> courseList = qr.query(sb.toString(), new BeanListHandler<Course>(Course.class), list.toArray());
            return courseList;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }

    }

    @Override
    public int saveCourseSalesInfo(Course course) {
        QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

        String sql = "insert into course( course_name,brief,teacher_name,teacher_info,preview_first_field,preview_second_field," +
                "discounts,price,price_tag,share_image_title,share_title,share_description,course_description,course_img_url," +
                "STATUS,create_time,update_time ) values(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";

        Object[] param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(),course.getTeacher_info(),course.getPreview_first_field(),
        course.getPreview_second_field(),course.getDiscounts(),course.getPrice(),course.getPrice_tag(),course.getShare_image_title(),course.getShare_title(),
        course.getShare_description(),course.getCourse_description(),course.getCourse_img_url(),course.getStatus(),course.getCreate_time(),course.getUpdate_time()};

        try {
            int i = qr.update(sql,param);
            return i;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    //根据ID查询课程信息
    @Override
    public Course findCourseById(int id) {

        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "SELECT \n" +
                    "id,\n" +
                    "course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "course_img_url,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "STATUS\n" +
                    "FROM course WHERE id = ?;";

            Course course = qr.query(sql, new BeanHandler<Course>(Course.class), id);
            return course;

        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }


    }

    //修改课程营销信息
    @Override
    public int updateCourseSalesInfo(Course course) {

        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "UPDATE course SET \n" +
                    "course_name = ?,\n" +
                    "brief = ?,\n" +
                    "teacher_name = ?,\n" +
                    "teacher_info = ?,\n" +
                    "preview_first_field = ?,\n" +
                    "preview_second_field = ?,\n" +
                    "discounts = ?,\n" +
                    "price = ?,\n" +
                    "price_tag = ?,\n" +
                    "share_image_title = ?,\n" +
                    "share_title = ?,\n" +
                    "share_description = ?,\n" +
                    "course_description = ?,\n" +
                    "course_img_url = ?,\n" +
                    "update_time = ? \n" +
                    "WHERE id = ?";

            Object[] param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(),course.getTeacher_info(),
                    course.getPreview_first_field(),course.getPreview_second_field(),course.getDiscounts(),course.getPrice(),
                    course.getPrice_tag(),course.getShare_image_title(),course.getShare_title(),course.getShare_description(),course.getCourse_description(),
                    course.getCourse_img_url(),course.getUpdate_time(),course.getId()};

            int row = qr.update(sql, param);
            return row;

        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }

    }

    //修改课程状态
    @Override
    public int updateCourseStatus(Course course) {

        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "UPDATE course SET STATUS = ? ,update_time = ? WHERE id = ?";

            Object[] param = {course.getStatus(),course.getUpdate_time(),course.getId()};

            int row = qr.update(sql, param);

            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }
}
